Automatic doffer for spinning-machines.



H. &1. H. WILLIAMS. AUTOMATIC DOFFER FOR SPINNING MACHINES.

APPLICATION FILED IULYZY. 1908.-

1,1 50,649, Patented Aug. '17, 1915.

6 SHEETS-SHEET 1.

Arf'rs.

H. a 1. H. WILLIAMS; AUTOMATIC BUFFER FOR SPINNING MACHINES.

APPLICATION nuzn JULY 21. 1908.

Patented 17, 1915,

H. & 1. H. WILLIAMS. AUTOMATIC DOFFER FOR SPINNING MACHINES.

APPLICATION FILED JULY 27' I908.

Patent-ed Aug. 17, 1915.

e SHEETS-SHEET 4.

H. & J. H. WILLIAMS.

AUTOMATIC DOFFER FOR SPINNING MACHINES.

APPUCATION FILED JULY27. 1908.

Patented Aug. 17, 1915.

6 SHEETS-SHEET 5.

I dfl lA/VA'A/ TORS ,v/r ymzzzums ,5 z hnzitzzlia s in the county of 1 5Figure tion.- Fig. 3

an elevation of the rig leasing the bobbin,

HUMPHREY WILLIA'MS AND. JOHN H. WILLIAMS, 0]? INDIANAPOLIS, INDIANA,

.ASSIGNORS, BY MESNE ASSIGNMENTS. V

MILLER, AND HARRY A. SEVERSON,

- PANY, or ROCKFORD, ILLINOIS.

AUTOMATIC DOFFER FOR SP NNING-MAC INES.

To all whom it may concern Be it known that we, HUMPHR-EY IZViL-.

LIAMS and JOHN H. WILLIAMS, citizens of the United States, residing atIndianapolis, Marion and State of Indi'-' ana, have invented certain newand useful Improvements in Automatic Doffe'rs for Spinning-Machines, ofwhich-the following is'a specification.

This invention relates to automatic means for replacing full bobbins onspinning frames with empty bobbins.

In the accompanying drawings, which illustrate oneembodiment of ourinvention,

in operating position upon a spinning frame. Fig. 2 is an. elevation ofthe left-hand side of thedofl'er, the adjacent portions of the spinningframe being shown in cross see; is a front elevation of the 'doffer on aconsiderably enlarged scale, in which the spinningframe is omitted. Fig;4 is an elevation of the left-hand side of the construction shown inFig.3. Fig. 5 is frame for guiding the bobbin-gripping de vices. Fig. 6 is aview similar to Fig. 5 except that the gripping devices are shown indifferent positions. Fig. 7

guide-frame for the bobbin-gripping devices, on the line 8-8 Fig. 4.-

devices. Fig. 10 is an enlarged detail plan view of the gear and ratchetdevice: Fig. 11-i's a crossfsection on the line-f1111 in Figs. 10 and12; Fig. 12 is a side elevation 40 of the gear andiratchetdevice. Fig.1-3 is a I detail VleW in plan of the lower shaft for supporting part ofthe gear and ratchet de-- vice. Fig. 14 is a' fragmentary detailhorizontally sectional Viwof the latch for reon the line 14.14 in Fig.

15. Figb15 is a detail view in end elevation of the constructionshown inFig. 14. Fig. I

[16 1s 'a' side elevation of the construction shown in Fig. 15. Fig.1?is a rear elevation of the cam for. actuating the mechanism to movethe'dofl'er along the spinning frame.

Fig. 18 is'a plan view ofthe lever provided with the throw-out shoulder.Fig. 19 is a Application filed July 27, 1908i Serial 0. 445,658.

- allel members which form dofi'er' frame and the magazine 27 for the 1is afront elevation of the. doffer t-hand side of the will obviate is arear ele- 30 vati-on of the construction shown in Fig. 3.

. Fig. 8 is a horizontal sectional view of the support for thetransverscFlg. 9 is a detail view in elevation of the upper end of 35. the framefor guiding the bobbin-gripping advance of the i floor 28.

a The hooks38 on the two chains specification of Letters Patent. IPatented Align 17, 1915..

I perspective view of one of the bobbin-gripillustrates the two generaluse on spinning ping devices. Fig. 20 forms of bobbinsin machines, whichare capable of being handled in the. doffer.

In the drawings, 25 indicates the spinning frame, 25- the spindle railthereof, and 25? the ring rail, The dofier is arranged to travel alongthe spinning to left, as viewed in Fig. 1. c

26 represents two vertically disposed par a portion of the bobbins whichare to be fed to the spinning machine. The two members 26 are providedwith an incline floor 28, the incline extending toward the left-hand endso that the frame from right bobbins'will be automatically fed, bygravity, to-the hoisting-chains. The left end of the magazine,between'the upright members 26, is closed by the vertical wall 29 (seeFig.

' A portion of the magazine is removably secured by means of the hooks30 and the eyes 31, so that when the removable portion of the magazineis empty" said removable portion loaded one substituted. Thisconstruction dofier when the same is in operation. The verticallydisposed members 26 also form a shafts 33 and 34, the former beinglocated at the top and the latter at the bottom of said members.

The shaft 34 is positioned immediately in discharge end of the inclineThe two shafts are each provided with a pair of sprocket wheels 36, thepair on one shaft registering with those on the other, and the sprocketwheels form the sup port for the hoisting chains 37 provided with thehooks 38' and are adapted to elevate-the bobbins fromuthemagazine.

ranged to register .with. one another, and their degree; of

removed from the magazine are elevated for the =purpose of changingthemfrom-a horizontal to a vertical may be disconnected and a.

the necessity for stopping the which are i 37 are arprojection andcurvature is such that a pair of hooks will remove and" sition beingnecessary before the placing of the bobbins upon the spindles in thespinning machine frame can be effected. The placing of the bobbins in avertical position is accomplished by discharging them from the sprocketchains 37, after they have been carried over the upper sprocket wheels36,

. mediately slide or pass out of itslower end and into the mouth of avertically disposed feed-tube 40, which is secured to one of the members26 by means of the bracket 41. See Fig. 4 of the drawings.

The upper end of the,feed-tube 40 is provided with a flared orfunnel-shaped endpiece 42. The tube 40 is arranged to stand in yerticalalinement with the row of spindles on the s mnin frame in order that thebobbin may accurately be placed upon the spindle at the-proper time. Thebobbins when fed into the tube 40 do not pass directly through said tubebut are momentarily held therein until the discharge end of the tube hasbeen brought into perfect registration with a bare spindle.

The tube 40 is provided with a bobbin retention device, which causes ammnentary pause of the bobbin within said tube, which consists of ahorizontally disposed catch-pin 45, the latter being mounted in atubular guide 46 which is secured to the tube 40. See Figs.- 15 and 16.The catch-pin 45 in its normal position obstructs the passageway of thetube 40, the pin being held in such position by meansof the spring 48-.The pin 45 is withdrawn laterally from the tube 40, to permit thedischarge of the bobbin at the proper time, by means ,of a wedge-shapedplate 50, provided with an integral stem 51 which extends to and engagesthe hingeblock 52. The hinge-block 52 is pivoted at 54 to the innermember 26 of the doffer frame, and is provided with the weight or hammer56 which, on the descent of the hinge-block 52, drives the bobbin,previously positioned, tightly upon the spindle.

The catch-pin 45 in the tube 40 is actuated at the proper time, therebyreleasing one of thebobbins, by means of the cam 60 coming into contactwith a dependent arm 59 on the hinge-block 52 through which theWedge-shaped plate is actuated.

The cam 60 is mounted on the transverse shaft 34 which supports thesprocket wheel 36 carrying the hoisting chain 37. By mounting the cam 60upon the shaft 34 the hoisting chains 37 may be timed so as to feed abobbin into the tube 40 in proper relation to the time when the cam 60is in a vertical position is the frame effecting a discharge of a bobbinfrom said tube. The cam 60 also operates the kicker shaft 65, mounted ina parallel plane in the rear of the shaft 34 and below the incline floor28 of the magazine.

The shaft carries the kicker 66 which has a movement back and forththrough inclined floor 28 of the magazine. The purpose of the picker 66is to keep the bobbins in the magazine in proper alinement as they arebeing fed on the hoisting chains 37. The rocking movement imparted tothe shafts 65 and kicker 66 is secured by providing said shaft with thecrank arm 67 which is engaged by a link 70 extending to andeccentrically connecting with the cam 60.

The hoisting chains 37 and the other mechanism heretofore described aredriven by means of a sprocket chain 72 which engages the sprocket wheel73 mounted on the transverse shaft 34. The sprocket chain 72 extends toand connects with the other portion of the machine which will now bedescribed.

Situated to the left of the magazine 27 having parallel sides androunded ends. The frame 80 is provided with a continuous groove 81 whichforms a guide-way for directing the bobbin-gripping devices in adetermined course. The frame 80 is secured by means of thebrace-ro'ds 82and 83. See Fig. 3.

.The bobbin-gripping device for removing the full bobbins from thespindles on the spinning frame is best shown in Fig. 19 and consists ofthe bar 85 which is provided with the integral T-shaped head 86 adaptedto .carry the studs 87. These studs project into the guideway 81 of theframe 80 and are provided with the heads 87 adapted to prevent lateraldisplacement of the gripping device. The bar 85 is provided with a pairof integral cars 88 which provide a bearingfor the outer bar 89 of thegripping device, and the. bar 89 is provided with the ears 90, whichcorrespond to and overlap the cars 88. A pivot pin 91 passes through theears 88 and and forms the pivot between the two bars 85 and 89. A spring92 is coiled 'around the pivot, pin 91 and provides the right 103secured within the frame 80. The outer end of the shaft 101 isprovidedwith a loose sleeve 104 (see 10) which carlongitudinally away fmounted between 5' inclined-portion 108 ries the pulley iiiotor 106 bymeans of the belt 107. The sleeve 104, through a ratchet mechanism whichwill be hereinafter described, intermittently rotates the shaft 101 inthe direction indicated by moved around the periphery of the frame 80.

It will be noted "by examining Figs. 2, l, 5,.and 8, that theguidewaySl, in the frame 80,, is not cut to follow a true planethroughout its course, but said course varies so as to shift thebobbingripping devices to and from the spindles on the spinningframe,

and the object of this variation in the course of the guideway 81 is topermit the devices, after a bobbin 1s gr1pped,to clear the spinnmg frameduring the downward movement of the gripping devices on the oppositeside,

and 'the arrangement of said incline is such that when the grippmg devces reach the top thereof they Willhave moved inwardly toward thespinning frame a sufficientdistance to enable the jaws 95 to rip thefull bobbin and, with the continue movement of the sprocket chain 97,will cause the bobbin to be removed from the spindle and carriedupwardly along'the The inclined portion-108 .of the guideway is madewith two leads so asto accommodate the studs 87 on the T-shaped heads onthe bars 85 of the gripping devices: During the upward movement ofaibobbin toward the top of the frame it is gradually moved from thespinning the guideway'81. v the gripping device enables the bobbin to becarried out of the spinning frame without interference. The bobbin iscarried downwardly on the opposite side of the frame 80 and thencecarried around the lower end thereof and then upward,when the bar 89 ofthe gripping device is engaged by a cam plate 110 (Fig. 3) secured tothe side of the frame 80, the said cam-plate being bent so as to forcethe end companion'bar 85, thereby causing the jaws 95 to open andrelease the bobbin, the latter dropping into a receptacle 112 removablythe dofier frame. suliicient length to until the gripping The cam-plate110 is of hold open the. jaws 95, device'moves across the in theguideway 81 and embraces the bobbin to be removed from the 105 which isconnected to the spinning machine frame.

the arrows, by which means the bobbin-gripping devices are,

Fig. which,

ping, in case a bobbin upon the spindle.- of the spindle the. bar 89side of the frame 80.

clearly rame, by the incli'nationin the course of.-

This changing. position of of the bar 89 toward the the'legs 113 and 113of When thejaws reach this position the free end of the bar 89 passesoverthe upper end of the camplate 110, causing the jaws '95 to impingeupon the bobbin under the action of the spring 92. As the free end ofthe bar 89 passesover the end of the cam-plate 110 it drops upon asecond cam-plate .115 (the;

cam-plates 110'and 115 are best shown in on the upward travel of thegripping device, induced by the sprocket chain 97, forces the bar 89-device outward, momentarily, so' that, the

aws 95will more firmly impinge the bobbin.

at the moment the latter is being displaced from the spindle. Theadditional tension applied to the gripping device by the camplate 115will prevent the jaws 95 from slip is too'tightly wedged When thebobbin-is free passes over the end of t e cam-plate 115, at which timethe springs 92 will provide ample tension for holding the bobbins untildisch rged by the actionof the cam-plate 110.

-To-preve'nt binding between the bars of t e gripping devices and theinclined portion 108 of the guideway 81, we provide a helper comprisingan L-shaped plate 117 which is pivoted at 118 to the side of the frame80 and normally occupies the position shown in Fig. 5 of the drawings.Theprong 119 of the L-shaped plate 117 projects across the face of thechain 97 and isengaged and operated by a pin 120 secured to said chain97, whereby the prong 119 is elevated with the upward movement ofthechain 97, 'as

shown in Fig. 6 of the When the ,plat e 117 is thus acted rear prong 122engages the pin l21-mounted on'the the bobbin-gripping devices, so thatthe bar 85 is helped As before stated, the

frame 80 by the sprocket chain 97, and thegripping devices are movedtransversely of said chain by the action of the inclmed por-' ment ispermitted by providing the barsr85 with the slots 126 the lugs 127 onthe sprocket chain 97, and to prevent-separation between the bars 85 andthe lugs 127 the latter are provided with the heads 128. See Fig. 8.

To prevent the jaws of the bobbin-gripping devices -from cl beatercomprising a Wire 130 (see Fig. 7) which is pivoted to the frame 80 at131 and extends toward the spinning frame to a point immediately in. therear of the line of spindles in said frame. At this point "thewire1305has an abrupt right angle bend with a downwardly slop nginclined portion of the gripping shaped' head 86 of the bar 85-of up theinclined portion 108 of the, guideway 81.v 1 gripping devices are movedaround the (see Fig. 19) to receive amping the threads deading tothespinning frame, we provide a drawings. upon, 1ts

'tion l08 'of the guideway 81, which *moveshears x vertically disposedlongitudinally 132 that terminates in a horizontal portion 133. The wire130 passes over one end of the bell crank lever 135 which is pivoted at136 and extends downwardly into the path and is actuated at eachrotation of the cam 138 secured to the sprocket wheel 100, whereby avertical reciprocating movement is imparted to the wire 130. As thethread passes under the horizontal portion 133 of the wire 130 inreaching the traveler on the spinning ring, it will be seen that thewire 130 will act as a beater to keep the thread, coming from thespinning frame, away from the bobbin when the latter is grasped by the'aws 95. As the gripping device removes the spindle a few winds of fromthe bobbin to upwardly without the bobbin from the thread will unravelallow the latter to move breaking the thread, and as the thread issevered the unraveled end, leading to the traveler, :will coil aroundthe spindle from which the bobbin is removed.

When an empty bobbin is placed upon the spindle, said coils ofthreadwill become clamped between the spindle and the bobbin, so that when thespinning frame is again set in operation the thread will be wound uponthe bobbin.

It has heretofore been mentioned that the thread issevered after theremoval of the full bobbin from the spindle, so that the bobbin maybesafely carried away by the bobbin-gripping devices. The severing of thethread is accomplished by means of a pair of horizontally arrangedshears 140. This pair of shears is movably mounted and is guided in adetermined plane by means of a hollow tube 141, mounted in the upright103 within the frame 80. A shaft 142, made square, to prevent the shearsfrom turning, slides longitudinally through a corresponding hole in thetube 141, and is integrally secured to one of the blades of the 140. SeeFig. 8. The companion blade of the shears integrally formed stub 145. Aplate 146 is rigidly secured to the tube 141 and is provided with anangular slot 148 adapted to receive the stud 145 on the shears. When theshaft 142 is moved toward the spinning frame the stud 145 slot 148formed to cause the blades of the shears to open and close as the stud145' moves toward the forward end of said slot. The closing of thebladesof the shears severs the thread after the bobbin is removed fromthe spindle. The shears 140 projects into shaft 142 by a ratchetmechanism illustrated in Fig. 12 in the drawings,

' through the" belt -meshes with a pinion a cam shoulder 156 140 isprovided with a will be forced tofollow the course of the slot 148 inthe plate 146. The

cam-lug which mechanism in addition to alternately operating the shearsis arranged The means for imparting movement-to the shears and thebobbin-removing and supplying mechanisms, alternately, includes thesleeve 104 rotatably mounted on the shaft 101. See Figs 10 and 12. Thesleeve 104 has fixed thereto the pulley 105 which is continuously drivenfrom the motor 106 107. The sleeve 104 is prothe fixed pinion 152 which153 on the parallel shaft 154, mounted immediately below shaft 101.. Bythis construction a continuous rotary movement is imparted to the shaft154. The pair of shears 140 is operated by providing the pinion 153 witha cam lug 155 (see Figs. 9 and 12) which lug, at each rotation of thepinion, comes into contact with mounted diagonally on the lever 158. SeeFig. 18. The lever 158 stands horizontally and immediately below thepinion- 153 and is pivoted at 160. The opposite end of the lever 158engages a vertically disposed lever 161 which is pivoted to the frame 80at 162. The lever 161 exvided with tends downwardly and pivotallyengages the central portion of the lever 165 at 166, and the latterlever is pivoted at 168 to the lower end of the frame 80 and extends toand pivotally engages the squared shaft 142 for actuating the shears140. v a The peculiar arrangement of the levers 158, 161 and 165multiplies the shifting quality .of the cam shoulder 156 sufficiently,to advance the shears 140 to reach and sever the thread. The shears isoperated during thebrief period of time required for the cam lug 155 onthe pinion 153 to pass across the face of the shoulder 156 on the lever158, during which brief period the other mechanisms of the doffer are atrest. When the cam lug 155 is removed from the cam shoulder 156 thelevers 158,161, 165 and'shears 140 are returned to their normalpositions, by means of a spring 170.

Fixed to the sleeve 104 is a'ratchet-toothed clutch disk 17 2'. Acompanion ratchet faced disk 17 5 is slidably'arranged on the shaft 101adjacent to the disk 17 2. The disk 175 is mounted on the shaft 101, bymeans of the feather 176 and issusceptible of being i movedlongitudinally on said shaft into and out of engagement disk 172 on thesleeve 104. The hub of the slidable disk 17 5 is provided with anannular groove 178 which is engaged by a shifting-yoke 180, the latterbeing movably mounted o the parallel shaft 154. Mounted on thecontinuously running shaft 154 and in the rear of the pinion 153 is thefixed disk 183 which is provided with an integral 185. 'At each rotationof the shaft 154 the cam-lug 185 comes into contact with a correspondinglug 187 (see Figs 11 and with the ratchet faced.

183; This longitudinal movement of the yoke shifts the ratchet faceddisk 17.5 on the shaft 101 to disconnect said. disk from the companiondisk 172 on the sleeve 104, thereby causing the chains 97 for operatingthe bobbin-gripping devices and the hoisting chains 37 to stand idle.185 passes ofl the cam-lug 187, the ratchet faced disk 175 and the yoke180 are returned to their normal positions by means of the spring 190.Since the shaft 101 is caused to pause in itsrotation to enable theshears 140 to be actuated, provision'must -be made to keep the shafts101 and 154 timed in uniformity with each other. This is accomplished byproviding the pinion 152 on the sleeve 104 with twenty-two teeth and thepinion 153 on the shaft 154 with twenty-six teeth. The contact betweenthelug 155 ,and the cam-shoulder 156is sufficient'to permit adisconnected grotation faced disks 172 and 175, equivalent to four teethon the pinion 153 so that both pinions will have a uniform operativerelation.

fwhich. shaft engages the frame at-216 at end .The rocker arm"215normally liesv against the periphery ofthe cam 218 mount-;

'The shaft 102 in the lower: end of the frame 80 is provided at one endwith'the sprocket wheel 193 adapted to carry the sprocket chain 72,whereby movement is imparted to the'hoi's'ting chains 37 through thesprocket wheel 73 on the transverse shaft 34. SeeFig.1. p

The dofler is moved step-by stepe along the front side. of the spinningframe to bring the discharge end of the tube 40 and the jaws of thebobbin-gripping devices into accurate registration. with the spindles sothatvthe bobbins may accuratelybe placed upon and removed from saidspindles in con-- secutive order. Rails 200 and- 201 are lo-' cated'atconvenient points upon the spinning frame.,' Attached to the doflerisan. b

arm 203 having a roller 205that the rail .200. Other Y rollers ranged'uponthe frame-members 113 and roll upon the rail 201. On the spinningframe. isa series of pins 208 which are placed in vertical spindles."See Figs. 1 and 3; The support ing legs {-113 on one side of the'dofi'er frame form the support for the -rock-shaft 210 1s with thecrank-arm 211, to which the connecting-link 212 is pivotally attached.The link 212 extends to and engages the lower end of the rocker arm'215which pivotally its. upper runs upon ed on the shaft 102. cam 218; therocker-arm 2.15'i's moved. to

' ward the right which imparts a partial rotationI to the rock-shaft210. This movewhereby said' yoke is moved longitudinally on the shaft154 away from the disk h When the cam-lug imparted tentlyv rotated.sprocket wheel between the' ratchet.

'vided withthe lug levers 158, 161, and

' the ratchet faced engagement with ates the. rocker-arm 215 205 arearalinement with the .bobbin-grippin devices ada ted provided at i'tsforward end g p At each rotation of the b I nent-of the shaft 210exerts-a pull upon the I hook 220, through the crank-arm 221, the ookbeing in contact with one of the pins 208 on the spinning machine frame25, cansing the dofiFer frame to be moved from one of the pins'208 tothe other. 4

.arm 215 is not only forced to travel toward the right by the action ofthe said cam returns said arm to its normal position. This isaccomplished by provid-v ing the cam 218 with the cam-groove -225 (seeFig. 17) which. engages a pin 227 on the rocker-arm 215.

e operationv of the dofleris'as follows: When thezmoto'r 106 is started,movement is to the loose sleeve 104 on the shaft 101 through the pulley105 and the belt 107, and through vthe companion ratchet faced disks172. and 17 5 the shaft 101 is intermit- The shaft 101 through the 99and the sprocket chain 97, carrying the bobbin gripping devices rotatesthe shaft'102. The latter shaft carries the sproeket of the sprocketchain 72, "the shafts 33 and 34 and the hoisting chains 37 are driven.The shaft 34 in turn operates the catch-pin 45 inthe tube 40 todischarge and place the bobbins on the spindle.

the shaft 154,- and the latter pinion is pro- 165 whereby the shears Theshaft 154, through shifting yoke 180, moves disk 175 intoand out of thecompanion disk -172 140 is operated. the disk 183 and on the sleeve 104,rotation of the shlaft 101 and the mechanism driven therefrom iseffected. The shaft 102,

driven by the sprocket',chain 97, also actuthrough the cam 218, and thearm rocks the shaft 210 which, hook 220-, wherebythe dofl'er isautomatically and intermittently moved alongv the spinning frame.

Having thus fully described our said invention, what we desire to secureby Letters Patent, is. I

L-An automatic bobbin dofl'er for spin- The rocker- The sleeve 104,through the pinions 152 and 153, operates whereby a pause in they meansof the crank-arm 221, actuates the cam 218 but wheel 193, and by means I155 for actuating the ningmachines including the 'dofler frame,

to remove the full bobbins from the-spinningmachine, a frame to supportvthe gripping devices, said supportmg frame having a groove adapted togui efthe gripping devices in a determined path, said an inclinedportion, means adapted to move said gripping devices along said grooveand up the incline therein, and means actuated y said preceding means toassist in moving the gripping devices up the incline in said groove. I

2..An automatic bobbin dofi'er for spingroove comprising inclinedportion,

ning machines including the dofi'er frame, bobbin-gripping devicesadapted to remove the full bobbins from the spinning machine, a. frameto'support the gripping devices, said supporting frame having a grooveadapted to guide the gripping devices in a determined path, said groovecomprising an a chain to move said grippin devices along said groove andup the inclme therein, and means actuated by said chain to assist inmoving the gripping de vices up the incline in said groove.

3. An automatic bobbin Cofier for spinning machines including thedofl'er frame, means to place the empty bobbins into operative positionon said spinning machine, a plurality of bobbin-gripping devices eachadapted to intermittently remove a full bobbin from the spinningmachine, a hook in said doffer frame adapted to engage the spinningmachine, an actuating device adapted to operate said hook, and means tointermittently operate said actuating device and hook, to intermittentlymove the doffer along the spinning machine.

4. In a portable doffer, the combination of a traveling framework, adofiing mechanism carried by said frameworkfand means carried by saidframework for preventing the dofiing mechanism from engaging the strandsextending from the drawing rolls.

5. In a portable doifer, the combination of a traveling framework, adolfmg device carried by said framework, and amember carried by saidframework in advance of the operative position of the dofling device,for moving the yarn out of the reach of said doifing device.

6. In a portable dofi'er, the combination of a traveling framework, adofiing device carried by said framework," and an inclined membercarried by said framework in ading device, for moving the yarn out. ofthe way of said dofiing device.

7. In a portable doffer, the combination of a traveling framework, adoffing device carried by said framework, and a beater carried by saidframework for moving the yarn out of the way of the dofling device.

I 8. In a dofling machine, in combination, "an upright guide arranged todirect bobbins onto the spindles of a spinning frame, a magazine forempty bobbins, located at one side of or out of alinement with saidguide, and means comprising a pair of rotary supporting elements and anendless conveyer running over sald elements for transferring bobbinssingly and successively from said magazine to said upright guide.

9. A doifing machine comprising an upright guide-tube adapted to directempty bobbins onto spindles, 'a magazine for empty bobbins, located in aplane below the upper end of said guide-tube, and an end-' vance of theoperative position of said d0ifless conveyer having devices thereonforming receptacles for single bobbins, said devices being arranged toreceive bobbins from said magazine and elevate the bobbins to a pointadjacent to the upper end of said guide-tube.

10. The combination with a spinning frame having a row of spindles, of adoffer.

' intervals.

11. In a doffer, a bobbin-grasping device comprising a pair of jaws andspring means tending to close said jaws, means for causing saidbobbin-grasping device to travel whereby to remove a bobbin from aspindle, and means acting on said grasping device to cause the latter toexert additional pressure upon the bobbin just as the bobbin is beingremoved from the spindle.-

12. A doffer having a pair of bobbingrasping jaws, spring means tendingto move said 'aws toward each other, and means for exerting additionalpressure on said jaws during the removal of a bobbin from its spindle.

13. In a doifer, in combination, an endless traveling member, abobbin-grasping device mountedthereon and comprising a pair of member.

15. In a doffer, a movably mounted member, a stationary shearblade and apivoted shear-blade carried by said member, and stationary meansarranged to operate said pivoted shear-blade during the movement ofsaidmember.

16. In a dofi'er arranged to travel along a spinning frame, a stationarysupport having a slotted cam plate thereon, a shaft mounted in saidsupport for longitudinal reciprocation, a shear-blade fixed on saidshaft, a pivotedshear blade carried by said shaft and having aprojection lying in the slot in said cam-pl to, and means forreciprocating said shaft to open and close said pivoted shear blade.

17. In a dofl er arranged to travel along' a spinning frame, incombination, a framework, a donning tube stationarily mounted thereln,and a bobbin-seating devlce movable with relation to said framework andspaced away from said-donning tube a distance equal to the distancebetween two adjacent spindles on the spinning frame.

18. In a dofi'er arranged to travel along a spinning frame, incombination, a guide arranged to direct onto spindles bobbins deana,this 2l,day of April, A. D. one thousand nine hundred and eight?HUMPHREY WILLIAMS. [1 s.] JOHN H. WVILLIAMS. [L. s.]

\Vitnesses:

F. WV. WOERNER. L. B. WOERNER.

